S.A.P.I.EN.S provides a central platform for sustainability research, where key ideas from all fields are published. Rather than publishing original research from individual fields, our priority is to publish reviews and opinion pieces that give a global perspective on the issues, in jargon-free language that facilitates access to interested parties from other fields. S.A.P.I.EN.S publishes review articles (Surveys, Analyses, Introductions) and evidence-based opinions (Perspectives, Views) that integrate knowledge across disciplines. Authors are required to make explicit: what is known; what is unknown, or not yet established; explanations of methodologies or paradigms employed; a clear delineation between hypothesis, fact and conclusion.